American Megatrends Atlas III PCI User manual

Jumper Settings
Atlas PCI III (Series 757)
Pentium
CPU Speed J-5 J-6 J-7 J-8
75 MHz x x
90 MHz x
100 MHz x
120 MHz x x
133 MHz x x
150 MHz x x x
166 MHz xxx
180 MHz x x
200 MHz x x
233 MHz x
x = short pins
AMD K6
CPU Speed J-5 J-6 J-7 J-8 J-16
133 MHz x x
166 MHz xxx
200 MHz x x
233 MHz x
266 MHz x x x
300 MHz xxxx
333 MHz x x x
366 MHz x x
x = short pins
System Jumpers
J15 PCI Bus Clock:
Short pins 1-2 for 66MHz CPU Clock
Short pins 2-3 for 75MHz CPU Clock
J14 CPU Voltage:
Short pins 1-2, 3-4, and 5-6 for no VRM
All jumpers open for AMD K6 and Intel P55C MMX
J2 External SMI
Short J2 to enable external SMI’s (factory default)
J3 Refresh Enable
J3 should always be shorted
Cache Memory Configuration
Cache Size J-1 J-9J-10 J-11 J-12
256 KB 1 * 2 1 * 2 1 * 2 1 * 2
512 KB x2 * 3 2* 3 2 * 3 2 * 3
x = short pins